Push-botton.



PATENTED JUNE 23, 1908 A. LUNGEN.

PUSH BUTTON.

APPLICATION FILED AUG. 22, 1902.

N0 MODEL.

3140mm: M 3% CH'bomama UNITED STATES.

Patented June 23, 1903.

PATENT @rricn.

ADAM LUNGEN, OF NEW YORK, N. Y., ASSIGNOR TO HIMSELF AND R. EDWARDS, OF NE\V YORK, N. Y.

PUSH-BUTTON.

SPECIFICATION forming part of Letters Patent No. 731,479, dated June 23,1903. Application filed August 22,1902. Serial No. 120,625. (No model.)

To aZZ whom it may concern.-

Be itknown that I, ADAM LUNGEN, a citizen of the United States, residing at the city of New York, in the borough of Bronx and State of New York, have invented certain new and useful Improvements in Push-Buttons, of which the following is a full, clear, and exact description.

This invention relates to electric push-buttons, the object being to provide a device which shall be simple and cheap to construct and efficient and durable in use.

. The invention consists of the details of construction hereinafter fully described and claimed.

In the accompanying drawings, Figure 1 is asideelevatiou of theimproved button. Fig. 2is a front view. Fig. 3 is a back view. Fig. 4 is a section. Fig. 5 is a side view of the button and a section of the insulating plate. Fig. 6 is another side view of the button. Fig. 7 is a perspective view of the shell. Fig. 8 is a perspective view of the spring-support. Fig. 9 is a perspective view of the insulatingplate, and Fig. 10 is a view of one of the circuit-terminal plates.

The button is adapted to be inserted in a cylindrical hole formed in a desk, board, or plate and to be held therein by friction in the manner hereinafter described.

The main parts of the button are a shell a, a movable button I), and an insulating-plate c. The shell a is cup-shaped and has an exterior annular flange a. on its forward edge to prevent its being forced through the hole in which it rests. The bottom of the cup has a slot a extending nearly across it, being narrow in the middle and enlarged at the ends, and on each side of the slot is an ear a 0, formed by stamping and bending up the metal. Inside of the cup is the movable button, consisting of a disk I), of ivory, motherof-pearl, or other suitable material, adapted to bepushed by the finger to close the electrical circuit. This button is incased at the edges and back in a metal sheath 1), out of which are stamped two cars 19 which are turnedrearward' and toward each other to embrace the middle portion of a strip of metal bent to form two arms 6 e. Said arms are insulated from the sheath b by the material e.

bottom of the cup a.

The arms approach each other immediately back of the button, as shown, and then gradually separate to form spring contact-arms, their extremities being enlarged into crossheads 6 and passing through the slot a in the In order to pass the cross-heads through the slot, they must be arranged parallel thereto, and after insertion the button is twisted ninety degrees, which brings the shoulders of the cross-heads against the bottom of the cup on the outside and locks the button Z) in the cup. A springfinside of the cup forces the button outward to the limit afforded by the engagement of the crossheads with the bottom of the cup. Against the back of the cup is fitted a metal ring g, having spring-ears g standing around the sides of the cup to furnish the necessary friction to hold the structure in place. To prevent this ring from turning, it is provided with two notches 9 which fit around the ears a on the cup, and it is held in place by the insulating-plate about to be described.

0 is a disk of insulating material, adapted to be secured against the back of the cup by passing the ears a a through the slots 0 c and bending them over, as shown in Fig. 4.

This disk thereby confines the ring g. The disk is also provided with a rectangular hole 0 at the center to receive the cross-heads e and keep them at right angles with the slot (1 in the bottom of the cup, and thus prevent the button from escaping, as well as keeping any reading matter on the face of the button upright.

Arranged across the face of the disk 0 are two metal plates t t' in line with each other and having their adjoining ends bent rearward to form an open V-shaped space between them, into which the cross-heads 6 may be moved to cause the latter to strike and scrape over the two plates 2' a, respectively. Plates z' are held in place by means of the ears 2", which enter slots 0 in the disk 0 and are riveted on the inner side. Each plate also carries a binding-screw 0 which enters a hole in the plate and disk. The riveted ends of the ears t" and the ends of the screws 0 come opposite the enlarged ends of the slot a in the cup, and therefore are not in contact with other metal parts.

. clean, owing to the scraping action, and the button will therefore be efficient.

No portion of the current can ever be shunted through the finger, because the button I) and the cup at are fully insulated from the parts which carry the current. The parts of the button are held together without screws, which makes the operation of assembling or taking apart simple.

I claim as my invention 1. A push-button. consisting of the combination of a cup-shaped metallic shell, a button therein, a spring in the shell adapted to force the button outward, a circuit-closing clement carried by said button and engaging with the bottom of the cup to prevent the escape of the button, a disk of non-conducting material attached to the bottom of the shell, and provided with a cavity for said crosshead and having circuit-terminals attached to said disk and adapted to be connected when the button is pushed inward.

2. A push-button consisting of the combination of a cup-shaped shell having an elongated slot in its bottom, a button in the shell, a spring tending to force the button outward, a cross-head carried by the button and adapted to pass through the slot and normally standing across the slot to engage with the bottom of the shell to limit the forward position of the button.

3. A push-button consisting of the combination of a cup-shaped shell having an elongated slot in its bottom, a button in the shell, a spring tending to force the button outward, a cross-head carried by the button and adapt ed to pass through the slot and normally standing across the slot to engage with the bottom of the shell to limit the forward position of the button, and a pair of circuitterminals with which the cross-head is adapted to engage to close the circuit, substantially as described.

4. The combination of a cylindrical cupshaped shell having ears stamped therefrom, a ring having notches embracing said ears and provided with spring ears arranged around the sides of the cup, a disk of insulating material attached to the cup by means of the ears on the latter, and clamping'said ring in place, a button in said cup and circuit-terminals attached to the disk, substantially as described.

5. In a push-button, the combination of a pair of circuit-terminals, a button of insulating material, a metal sheath attached to the back of the button and having two cars stamped therefrom and bent toward each other to form a loop, and a circuit-closer consisting of a strip of metal bent double and confined in said loop, as set forth.

In witness whereof I subscribe my signature in presence of two witnesses.

ADAM LUNGEN. lVitnesses:

B. A. OoLoHAN, ADAM APPLE. 

